US1330039A - Electric generator - Google Patents

Description

2 SHEETS-SHEET I.

L. 1. LE PONTOIS. 1. G. KIPP. GUARDIAN. ELECTRIC GENERATOR. APPLICATION FILED 0CT.28,19I4 RENEWED MAY M IQIB- E Patented Feb. 3,1920.

L. 1. LE PONTOIS.

1 a KIPP GUARDIAN ELECTRIC GENERATUR. m'ucmon FILED OCT-26,1914. RENEWED may 4. 1m.

Patented Feb. 3,1920.

2 SHEETS-SHEEI 2- Jamm . Be it knowfi that I, LEON UNITED STATES. PATENT OFFICE.

mow 4r. LE rom'ors. oi:- LAKEWOOD, 0310;.1. o. mrouannunor was Hanson AND ESTATE OF SAID LEON J.

LEjPONTOIS, SAID LE PON'IDIS ASSIGNOR, BY MESN'E A SSIGN MEN TS,"1O THE TEAGLE COMPANY, OF CLEVELAND, OHIO, A CORPORATION or omo.

To all whom it concern:

J.-'L1: Pon'rors,

a citizen of the Republic of France, residing at Lakewood, in the county of Cuyahoga invented certain and State of Ohio, have new and useful Improvements in and Relating to Electric Generators, of which the following is a specification.

This invention relates to improvements in ignition mechanism for internal combustion engines,- more particularly to an electric gentension electrical im ulses for ignition purposes.

' nu of the objects of my invention has been to provide an ignition generator in whichpai-ts of an internal combustion motor 'erator for producing high are utilized as parts of the genera tor,thereby reducing the number of parts required as 4 compared with the number for sucha motor and a standard ignition generator or magneto.

Another object of my invention has been to dispense with additional gears or gearing -for driving a magneto and to utilize as a mtor sha ft a necessary shatter the internal combustion motor with which a generator of my improved type is incorporated, thereby insuring'more perfect ignition synchronism than is obtainable where a plurality of.

gears or gearing is introduced between a motor shaft and any ofthe standard forms of ignition generators or magnetos now in general use. 7

Other-objects of my invention will be obvious to those skilled in the art to which it relates, from the disclosures herein of a mechanism embodying it which have selected as an example.

Figure 1 is a vertical longitudinal section of mechanism embodying my'invention.

Fig. 2 is a section on the line 2-2, Fig: 1. Fig.3 is a side of the generator withcover removed.

Fig. 4 is a section on the line 4- -4, Fig. 1, all the parts being enla1ged y Fig. 5 is a view, partly in side'elevation and partly'in section of the circuit closing mechanism.

Figs. 6, 7, and 8 a1 details.

Fig. 9 is a rearele 'ation of a part of the gtptor.

Fig. 10 is afront elevation of the parts Shown in Fig. 9 v

Eig. 1 1 is a wiring diagram.

Specification of Letters latent.

567. nenewedira 4, 1918. Serial No. 282,659.

' or portion 1.

'ing.preferab y consists of a se tion 6 of ELECTRIC oiinmron.

Patented Feb. 3; 1920.

enlarged section 1 to receive a driven gear in this example a. worm gear, not shown and a section'l", communicating therewith, to receive the driving gear 2 on thecrank' shaft 2'. This shaft is mounted in the easing'in suitable bearings at 2, 2", and has an outwardly projecting end 2. When the motor gear casing is made of iron, it is possible and economical to form one pole piece of the magneto integral with the'casing casting. Accordingly, I have, in-Fig. '1, shown the laterally extending-pole piece 1 tobe formed integral with the 'casing 1. This casing also has a downwardly extending arm spacing piece of non-magnetic-material. It

comprises'a tubular section 4 fitted into the SQ gear casing to, receive the bearing 2" for the crank shaft, an off-set portion 4 to provide space for-the generating coil to be.

hereinafter' described, and a shoulder 4". This piece 4 may be secured to the gear casing in any suitable manner, as by bolts 4* of non-magnetic material, and may be a pressure casting if desired.

5 is apole piece having polar projections 5 and 5* with polar. surfaces '5 and 5, respectively. This pole piece is preferably made of laminae 'of iron and may be secured to the non-magnetic supporting plate 4' in any suitable manner. ,I have shown this to be accomplished by means of studs and caps t 'of non-magnetic material.

A generating winding-6 is supported by the pole-piece 5 and preferably surrounds the polar pro'ections 5"thereof. This windrelatively' coarsewire, the primary winding," and a section 6 of relatively fine wire, the secondary winding. I

7 is an unwound inductor rotor, prefera ably made of laminm of iron and carried by 106 the "portion-250i? the shaft 2' with which it is rigid] connected, by a. key 7'. The" polar sur 1; of the pole piec 1: is

H Fig. 1'2\is a detailshowing of a modifica- 66 4 is a po1e ;supporting and formed in the arc of the circle containing the polar surfaces and 5", and of which the'axis of the rotor is the center. The polar 'surf aces'of the rotor 7 cooperate with 5 the polar surfaces 1" 5 and 5 in amanner to be hereinafter set forth.

8 is a field magnet, The one shown consists of the well known horseshoe type of permanent magnet. Each magnet has its 10 upper leg resting uponand secured to the pole piece 1' as by means of a screw 8'-. be lower leg of each of these magnets is in magnetic contact with the laminated pole piece 5 screws 8. a

' 'Mechanisnr for opening and closin' the circuit of the primarywinding 6* may e of any-suitable and well known character. In

the drawings this breaker mechanism is indicated as anentirety by 9. 9 is a frame, preferablyof non-magnetic material, such as a die casting, which may be secured to the ole piece lby means of cap screws 9. It

lies a laterally extending box-like portion 9", in which a suitable condenser 10.1nay be :posit-ioned and held, and a rearwardly extending ,lu 9 .to which is pivotally con nected the reaker 'arm 11 which carries a 'fiberslioe 11. A spring 12 mounted in a recess 9 in the frame 9' and centered by the stud 9, bears at its lower end on the upper surface of the breaker arm 11 and serves to press its free end 'toward'the axis of the driving shaft 2. 13 is an electrode carried to make contact intermittently with the electrode 1-1 adjustably mounted iira sup- )ort 15 supported from the frame 9 by the bolt 15 and insulated therefrom by the insulating material 15". 16 is a cam secured to and rotating with the drivin shaft 2 and disposed so that its surface wil engage with the shoe 11 and cotiperate'with thespring 1'2 intermittently to effect the engagementand disengagement of the electrodes 13, 14 during therotation of the shaft 2.

()ne terminal 16 of the primary winding 6" may be connected by the conductor l7'to the support 15 and electrode 11. The other terminal 6 of the primary winding may be grounc ed. One terminal 6 of the secondary windin may be connected to the terminal 6 of tie primary winding and the other terminal 6' to one electrode of a suitable spark )lug 18 in the engine cylinder, the other electrode of which is grounded to the frame in the well known manner. The condenser 10 is connected in parallel with the breaker electrodes 13', 14/

In order to prevent oil fromthe gear case 1 getting .into the magneto proper, suitable asketing or packing may e provided. I are illustrated a simple form which consists of a sleeve mounted on the shaft 2 and having a flange 20' engaging the adjacent and preferably secured thereto by by the free end of the arm 9 and adapted bearing flange, the sleeve havin a slot 20,

and pm, 20, connection with tie shaft. A

spring. 21 hearing at -one end against the flange 20 and at. its other end against the adjacent side of the rotor servesto maintain the sleeve 20 in lace. Should any oil pass the sleeve, it wi collect in a pocket in the piece 4', which pocket is drained by the duct 4!. 4

The operation of the mechanism will be readily apparent. During'the rotation of the rotor 7 its polar surfaces will es blish a path of least magnetic reluctance be ween the polar surface 5 of the polar projection 5" and the polar surface 1 of the )ole piece 1. \Vhen the parts arein this relationship the flux'between the )oles of the permanent magnet will extend tirou h the, polar projection 5", which-practic'aly serves as a core for the coil 6. As the rotor 7 is then rotated the reluctance of the path through the polar projection 5" will increase and the density of the flux threading through the generating winding willdccrease. I prefertoclose the circuit of the primary winding during decrease of magnetic flux therethrouglnsd that the when thecircuit is closed will be always that due to flux decrease through the winding and its effect upon the )ermanentmagnets, if any, willfbe in the direction to tend to build up rathcrthan break down their magnetism. Finally, during its rotation,'1he rotor 7 will establish a path of least re luctance throu h the polar projection 5" and entirely outsic e of the polar projection 5 in fact will cause an air gap to exist between the polar projection 5 and the rotorf The cam 16 is timed with reference to the rotation of the shaft 2 so as to open the circuit of the primary winding substantially at the instant of generation of current therein due to maximum rate of flux decrease throu h that winding. Upon the opening of tie primary circuit in this manner, a high electromotive force will be induced in the seccurrent generated in the primary winding ondary 6? which will cause a spark to jump V formed and it and the upper leg of the magnet are suitably secured to the lug 23 by means of screws'23'. In order to make the operatin parts of the magneto weather and practical y water proof, it suitable external housing or casing may be employed. I have illustrated one at 24.

One of the problems in connection with the construction ofi'a tractor wheel of the type under consideration is to keep its power generating parts, including the motor roper and electric ignition generator there or, within a reasonably small com ass.

5 My invention lends itself peculiarly we 1 to this end. Furthermore, a generator constructed in accordance .with my idea will be suitably and rigidl supported and fully capable of withstanding the various and repeated shocks and strains to which it is sub Je'cted in the ordinary usage of the tractor wheel on the road. of iron, and the pole piece 1 is formed integral therewith, the latter may be machined 16 {at the same time that the ear case is being 6 .most economimachined so as to afford t cal method of manufacture. V a

It will be noted that the bear' in addition to operating as a crank sha bearing, performs the unction of counteracting tie stresses on the extended end 2 of the shaft due to the field on the rotor 7. Many alterations applications of my invention will suggest themselvesto those skilled in the art of'making mechanism of the-class described, .without departing from the scope and spirit thereofj My disclosures and description hereinare purely illustrative and are not intended to be in any. sense limiting.

What I claim is: E 1. In a machine of the class described, an engine casing of iron, having a pole piece formed integrally therewith, a plurality of polar projections spaced from sa d pole piece and separated from said engine casing by a spacin to sup orte by said engine casing,

slia having one end projecting between the polar faces of said pole piece and said polar projections, anunwound rotor carried the extended 'end of said engine shaft, a

generating winding'on one of said polar projections and a field magnet embracing said pole piece and polar pro ections.

- 2. In a machine of the class described, an engine casing of iron, having a pole piece formed integrally therwitli, a plurality of polar projections spaced 'from .said' pole iiece and separated in a spacing piece of non-magnetic material supported by said engine casing, an engine shaft having one end pr Jecting between the polar faces of said pole piece and said polar projections, anunu'ound rotor carried by the extended end' of saidengine shaft, a gene rating winding on one of said polar projections, a field magnet embracing said pole iece and polar projections, a cam carried iiy said engine shaft adjacent said rotor,- and circuit opening and closing mechanism actu- -;-sated by said cam. 3. In a machine of the classdescribed,

tended end of said engine shaft, a

Where the gear case is action of the magnetic y r orted in construction, and. many widely difl'ering embodiments and piece of non-magnetic material an engine .projections supported rom said engine casingan engine casing of iron, having a pole piece formed integrally therewith, a plurality of polar projections spaced from said pole iece and separated from said engine casin y a spacinggpie'ce of non-magnetic materia supported y said engine casing, an engine shaft having one end projecting between the polar faces of said pole piece and said polar pro-' jections, an unwound rotor carried by the exgenerating wmd ng'on one of said polar pro ections, a field magnet embracing said polepiece and polar projections, a cam carried by said engine shaft'adjacent said rotor, and circuit opening-and closing mechanism mounted on said ole piece and actuated by said cam.

4. a machine of the class described, an engine casin of iron, havinga pole piece formed integra ly therewith a plurality of polar projections spaced from said pole piece and separated from said engine casingv by a spacing)piece of non-magnetic material supy said engine casing, an engine shaft aving one 'end projecting between the polar faces of said pole pieces and said polar projections, an unwound rotor carried by the extended end of said engine shaft, a generating winding on one of said polar projections, it field magnet embracing said pole piece andpolar projections, a cam carried by said engine shaft acondenser and breaker support secured to said casing, a condenser mounted on one side of said support, anda breaker mounted on the other side thereof and actuated by said cam.

5. In a machine of the class described, a pole piece and a plurality of polar projections suitably spaced and supported at either side of the extended end of an engine shaft, an unwound rotor on said engine shaft, a Q generating winding'on one of said polar projections, and a field magnet having one pole I in magnetic contact with said 'pole piece and its other pole in magnetic con-Y. tact With-said polar projections.

6. In a machine of the class described an engine casing, an engine shaft extending therefrom, a pole piece extending from said casing parallel Withsaid engine shaft and secured to the casing, a plurality of polar from said casing by i. a section of non-magnetic material and having polar faces'oppositely disposed to the po a r faces of said pole piece, a rotor car'- ried by said shaft between the polar faces and said pole piece and polar rojections, a generating winding, and a fiel magnet embracing said pole piece and polar projections and supported from said engine casing. 1

7. In mechanism of the class described, an' engine casing an engine shaft extendingtliere'through, a pole piece and a plurality of polar projections. spaced apart at opposite sides of the extended end of said polar faces engine shaft and supported from said engine casing, an unwound rotor connected to said exten ed end of said havin polar faces dispo to ooiiperate with t e polar faces of said pole piece and polar ro ectionsya generating windin on one of said polar projections, and a old magnet embracing 'said pole piece and polar projections.

8. In a machine of the class described, an engine casing, an engine shaft extending therethrough, a pole piece and a plurality of polar pro]ections spaced a art at oppo site'sides of the extended end ofsaid enine shaft, supported from said engine casmg and havin 'polaigsurfaces in arcs of a circle struck rom the axis of said engine shaft as a center, an unwound rotor connected to said extended end of said engine shaft and having polar faces arranged between and coiiperating with the polar surfaces of said'pole piece and polar projections, a generating winding on one of said polar. projections, and a field magnet cinracing said pole pieces and polar projections.

9. In mechanisms of the class described, the combination of an en inecasing, a rotatable engine shaft extent ing theretlu-ough. a bearin for said shaft arranged in said casing adjacent the extended end of said shaft, a plurality of pole pieces supported from said casing one side of said extended end of said shaft and having polar faces disposed in arcs of a circle struck from the axis of said shaft as a center, an unwound rotor carried by the extended end of said shaft adjacent said bearing and having polar faces disposed to coiiperate with the polar faces of said polar projections, a

generating winding on one of said polar projections, and a field magnet supported from said casin with its poles disposed in inductive re ation to said polar projectionsand rotor, whereby stresses on said shaft due to magnetic action upon said rotor are counteracted by said bearing.

10. In mechanism of the classdescribed, the combination of an engine casing, a crank shaft-having one end extendingthrough said casing, a bearing for said sha t arranged in said casing ad acent the extended end of said shaft, a plurality of pole pieces supported from said casing at one side of said extended end of said shaft and having polar rom faces disposed in arcs of a circlestruc the axis of said shaft as a center, an unwound rotor carried by the extended end of said shaft adjaqant said bearing and having polar faces disposed to coiiperate with the said polar pro1ectrons, a genof crating winding on one'of said polar projections, and a field magnet supported from said casin with its poles disposed'in inductive relation to said polar projections andseeiggineshaft and rotor, whereby said bearing operates both as havin one end mounted in said bearing and exten ing outwardly therefrom, an unwound rotor formed inde endently of the en inc parts and carried y said extended end of said crank shaft adjacent to said bearing, a field magnet supported by saidcasing with its poles in inductive relation to said rotor, a pole piece in inductive relation to one pole of said magnet, a generating winding carried by sai pole piece, a cam also carried b the extended end of said crank shaft, and circuit closing and opening mechanism cooperating withsaid cam and said generating winding. i

1'2. In mechanism of the class described, an engine casin a rotatable engine shaft extending theretirough, a bearing for sai shaft arranged in said casing and adjacent the extended end of said shaft, a stator detachably secured to said casing at one side of the extended end of said shaft and hating a plurality of polarprojections with polar faces disposed in arcs of a circle struck from the axis of said shaft as a center, a cam carrieib ythe extended end of saidhaw rotor carried by the extended end of said shaft between said cam and said bearing, and having polar faces disposed to coiiperate with the polar, faces of said polar projections, a generating winding on one of said polar projections, 11 field agnet su )ported from saidcasing'with its les in in uctire. relation to-said polar projections and rotor, and circuit ,closinlg1 and opening mechanism coiiiperating wit said cam and said generating winding, whereby stresses on said shaft due to magnetic action upon said rotor are counteracted by said bearin I 13. fa mechanism of the class described. the combination with a rotatable'shaft of an internal combustion engine, of an ignition generator for said engine comprising an unwound rotor Which'is both mounted on said engine shaft and formed independently of the other engine parts, and a stationary enerating coil supported by the engine frame in inductive re atlon to the rotor.

14. In mechanism of the class described, the combination with the casing" and a roignition generator for said ohginehavm stator parts comprising a generating col and an unwound rotor'which 18 both mounted on the engine shaft and formed independently oft e other ehgine parts.

mounted on the engine casing 15, In mechanism of the class describe'd, .In testimony whereof I affix my signature the combination with a rotatable crank shaft in the presence of two witnesses. of an interna com ustion engine of an ignition generator for said .engine c omprising LEON LE PONTOIS' 5 an unwound rotor mounted directly on said Witnesses shaft and formed independently of the qther JOHN C. BARKLEY,

- engine parts. EDWARD R. ALEXANDER.

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